Python while Loop

A while loop is used to execute a block of code repeatedly until some conditions are true.

Example

To prevent from running the loop forever, increament the value of i after every loop.

i = 1
while i < 5:
    print(i)
    i += 1
  

Output

The break statement

The break statement is used to terminate the loop before the looping through all items is complete.

Example

Terminate the loop when i is mango:

fruits = ["grapes", "mango", "apple", "pineapple", "banana"]
i = 0
while i < len(fruits):
    #go to next loop if the current value of i is apple
    if(fruits[i] == "apple"):
        break
    print(fruits[i])
    i += 1
print("End of program")
  

Output

The continue statement

The continue statement is used to skip the current loop and continue with the next loop.

Example

Continue when i is "apple"

fruits = ["grapes", "mango", "apple", "pineapple", "banana"]
x = 1
i = 0
while x < len(fruits):
    x += 1
    if(fruits[i] == "apple"):
        continue
    print(fruits[i])
    i += 1
print("End of program")
  

Output